Air-suction valve.



H. P. GRAY.

AIR SUCTION VALVE.

APPLICATION FILED MAR.48. I9l5. 1,1 58,679. Patented Nov. 2, 1915.

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INVENTOR, A

WITNESSES.- ,Harzy Gray (56. BY .f3/M.; www, @M ATTORNEY H. P. GRAY.

AIR SUCTION VALVE. APPLlcfxTloN FILED MAILS. 1915.

'1 ,.1 58,679. Patented Nov. 2, 1915.

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IHM I I IIHIHHHHH INVENTOR, WITNEssEs.- Harry J2 gm@ ATTORNEY v iiNrrEn stares rarENr erica.

HARRY r. GRAY, OE OAKLAND, CALIFORNIA, AssIeNOE ro UNITED ENGINEERING worms, OE saN EEANcIsoO, oALIEOaNIA., A CORPORATION OE CALIFORNIA.

AIR-sUorIoN vApLvE.

specification of Letters Patent.

Patented Nov. 2, i915.

Application led March 8, 1915.v Serial No. 12,823.

To all @hom t may concer/a:

Be it known that I, HARRY P. GRAY, a

citizen of the United States, residing at` Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Air-Suction Valves, of which the following is a specification.

The present invention relates to air suction valves of internal combustion engines working on the two-stroke principle and using the crank case as an air pump for scavenging the working cylinder.

The Object of the invention is to provide a simple and effective nonreturn valve of cheap construction for admitting air to the crank case.

In the accompanying drawing, Figure l is a sectional view of a two-stroke internal combustion engine equipped with my improved air suction valves; Fig. 2 is an enlarged inner side View of one of the valves detached; Figs. 3 and 4 are sectional views on the lines 3-3 and 4-4 respectively of Fig. 2; Fig. 5 is a view similar to Fig. 4 of a modified form of the invention; and Figs. Y

6, 7, and 8 are views similar tO'Figs. 2, 3 and 4 respectively of a further modification of the invention. A

Referring to the drawing, 1 indicates the crank case of a two-stroke internal combustion'engine, to which crank case air is admitted through openings 2 therein. Over each opening is a plate 3 having holes 4 therethrough by which it can be secured to the wall of thecrank case and having valve openings 6, which extend parallel witheach other in two series, separated from each other by .a bar 7 formed integral with the plate. Upon the inner side of said plate over pairs of alined openings 6 of the two series, are placed spring metal valves 8 closing said openings, and saidvalves are held in place by a bar 9 immediately over the bar 7 and secured thereto by screws 10 screwed through the bar 9 into the bar 7 between the valve. Each opening 6 tapers slightly towards its inner side or that next the valve. Stop bars l1, secured to the plate 3 over the terminal portions of the valve, limit their outward movement.

found that by such construction the valves openin succession, each valve opening when suiiicient suction is exerted thereon, the longer valve being less able to resist the suction thereon than the shorter. On account of their opening in succession they admit air gradually and without any appreciable noise, whereas if the valves were all of equal length, they would all open simultaneously, and the full amount of air would rush in instantaneously with considerable noise.

In the modication of the invention shown in Fig. 5, the valves are secured to the plate at one end, as shown at l2.

In the form of the invention illustrated in Figs. 6, 7 and 8, the valve openings 6 are formed in the plate 3 within a circular wall 13, and the bar 7 extends diametrically across said plate, the valve openings extending at right angles to said bar to a point near said circular wall, so that those nearest the center of the bar are the longest and those at the end of the bar are the shortest.

' I claim l. An air suction valve for internal combustion engines comprising a plate secured to the frame of the engine over an opening therethrough and having a series of openings therein, spring-metal valves of unequal length on the inner side of said plate closing said openings, and means for securing said valves to the plate at one end only of each opening.

2. An air suction valve for internal combustion engines comprising a plate secured tothe frame of the engine over an opening therethrough and having a series of openings therein, spring-metal valves on the inner side Of said plate closing said Openings, and a bar over said valves and secured to said plate. t

3. An air suction valve for internal combustion engines comprising a plate secured to the frame of the engine over an opening therethrough and having a series of openings therein, spring-metal valves on the inner side of said plate closing said Openings, a bar over said valves and screws between the valves and securing the bar to the plate.

4. An air suction valve for internal coinbustion engines comprising a plate secured to the frame of the engine around an opening therethrough and having over said opening spaced parallel bars, the plate being Open between said bars to form parallel openings, and a transverse bar dividing said openings into two series.

5. An air suction valve for internal combustion engines comprising a plate secured to the frame of the engine around an openv ing therethrough and having over said opening spaced parallel bars, the plate being open between said bars to form parallel openings, and an obliquely extending transverse bar dividing said openings into two Copies of this patent may bevobtained for witnesses.

five cents each, by addressing Washington, D. C.

series tothe other.

In testimony whereof I have hereunto set 15 Y l my hand in-the presence of two'subscribng HAM-mr P, GRAY.'

Witnesses:

- F. M.WRIGHT,

D. B. RICHARDS.

the' Commissioner of Patents, 

